On this day, 79 years ago, July 25, 1946 (June 27, 1946, the first underwater nuclear explosion carried out by the United States made its debut in a bikini. A new style of swimming suit named "Bikini" On July 25, 1946, an atomic bomb exploded in the calm Pacific Ocean near the Bikini Islands. This was the first underwater nuclear explosion in history carried out by the U.S. military. The atomic bomb, known as "Bikini Helen" by engineers of the Manhattan Project, exploded with astonishing power, sinking 11 giant warships and injuring six. This old fleet was used for testing and was parked in the explosion zone. Meanwhile, on beaches in Europe and the United States, women are wearing new two-piece swimsuits, also named "bikinis." The atomic bomb exploded on Bikini Reef, the United States conducts underwater nuclear test on Bikini Atoll